CVE-2026-47201

HIGH EPSS 5.8%
Published Jun 2, 20264w ago · Modified Jun 17, 20262w ago
8.5 CVSS 3.1
High
Find Similar
Published Jun 2, 2026 4w ago
Last Modified Jun 17, 2026 2w ago

Description

authentik is an open-source identity provider. Prior to versions 2025.12.5, 2026.2.3, and 2026.5.1, authentik's SAML Source ACS endpoint is vulnerable to XML Signature Wrapping when validating upstream SAML responses. An attacker with any account at the upstream IdP can reuse a valid signed assertion to authenticate as another federated user. This issue has been patched in versions 2025.12.5, 2026.2.3, and 2026.5.1.

CVSS Details

Base Score
8.5
Exploitability
1.8
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
5.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-20 Improper Input Validation Validation
CWE-347

Affected Products 3

VendorProductVersionRange
goauthentikauthentik* <2025.12.6
goauthentikauthentik*≥2026.2.0  –  <2026.2.4
goauthentikauthentik*≥2026.5.0  –  <2026.5.1

References 1

  • github.com https://github.com/goauthentik/authentik/security/advisories/GHSA-c3m2-jqmq-pvp3
    MitigationVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.